package com.eye.catcher.utils;

import java.security.MessageDigest;

public class MD5EncryptUtils {
	private static final String[] hexDigits = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

	public static String byteArrayToString(byte[] b) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			resultSb.append(byteToHexString(b[i]));
		}
		return resultSb.toString();
	}

	private static String byteToNumString(byte b) {
		int _b = b;
		if (_b < 0) {
			_b = 256 + _b;
		}
		return String.valueOf(_b);
	}

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0) {
			n = 256 + n;
		}
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}

	public static String MD5Encode(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");

			resultString = byteArrayToString(md.digest(resultString.getBytes()));
		} catch (Exception ex) {
		}
		return resultString;
	}

	public static String MD5Encode16(String origin) {
		String resultString = null;
		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");

			String resultOf32 = byteArrayToString(md.digest(resultString.getBytes()));
			resultString = resultOf32.substring(8, 24);
		} catch (Exception ex) {
		}
		return resultString;
	}

//	public static void main(String[] args) {
//		System.out.println(MD5Encode("asdfghjk"));
//	}
}
